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        <h1>
          <span class="m-breadcrumb"><a href="Releases.html">Release Notes</a> &raquo;</span>
          Release 3.3.0 (2022/01/03)
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          <h3>Contents</h3>
          <ul>
            <li><a href="#release-3-3-0_download">Download</a></li>
            <li><a href="#release-3-3-0_system_requirements">System Requirements</a></li>
            <li><a href="#release-3-3-0_summary">Release Summary</a></li>
            <li>
              <a href="#release-3-3-0_new_features">New Features</a>
              <ul>
                <li><a href="#release-3-3-0_taskflow_core">Taskflow Core</a></li>
                <li><a href="#release-3-3-0_cudaflow">cudaFlow</a></li>
                <li><a href="#release-3-3-0_syclflow">syclFlow</a></li>
                <li><a href="#release-3-3-0_utilities">Utilities</a></li>
                <li><a href="#release-3-3-0_profiler">Taskflow Profiler (TFProf)</a></li>
              </ul>
            </li>
            <li><a href="#release-3-3-0_bug_fixes">Bug Fixes</a></li>
            <li><a href="#release-3-3-0_breaking_changes">Breaking Changes</a></li>
            <li><a href="#release-3-3-0_deprecated_items">Deprecated and Removed Items</a></li>
            <li><a href="#release-3-3-0_documentation">Documentation</a></li>
            <li><a href="#release-3-3-0_miscellaneous_items">Miscellaneous Items</a></li>
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<p>Taskflow 3.3.0 is the 4th release in the 3.x line! This release includes several new changes, such as sanitized data race, pipeline parallelism, documentation, and unit tests.</p><aside class="m-note m-info"><h4>Note</h4><p>We highly recommend that adopting Taskflow v3.3 in your projects if possible. This release has resolved pretty much all the potential data-race issues induced by incorrect memory order.</p></aside><section id="release-3-3-0_download"><h2><a href="#release-3-3-0_download">Download</a></h2><p>Taskflow 3.3.0 can be downloaded from <a href="https://github.com/taskflow/taskflow/releases/tag/v3.3.0">here</a>.</p></section><section id="release-3-3-0_system_requirements"><h2><a href="#release-3-3-0_system_requirements">System Requirements</a></h2><p>To use Taskflow v3.3.0, you need a compiler that supports C++17:</p><ul><li>GNU C++ Compiler at least v8.4 with -std=c++17</li><li>Clang C++ Compiler at least v6.0 with -std=c++17</li><li>Microsoft Visual Studio at least v19.27 with /std:c++17</li><li>AppleClang Xcode Version at least v12.0 with -std=c++17</li><li>Nvidia CUDA Toolkit and Compiler (nvcc) at least v11.1 with -std=c++17</li><li>Intel C++ Compiler at least v19.0.1 with -std=c++17</li><li>Intel DPC++ Clang Compiler at least v13.0.0 with -std=c++17 and SYCL20</li></ul><p>Taskflow works on Linux, Windows, and Mac OS X.</p></section><section id="release-3-3-0_summary"><h2><a href="#release-3-3-0_summary">Release Summary</a></h2><ol><li>This release has resolved data race issues reported by <a href="https://github.com/google/sanitizers">tsan</a> and has incorporated essential sanitizers into the <a href="https://github.com/taskflow/taskflow/actions">continuous integration workflows</a> for detecting data race, illegal memory access, and memory leak of the Taskflow codebase.</li><li>This release has introduced a new pipeline interface (<a href="classtf_1_1Pipeline.html" class="m-doc">tf::<wbr />Pipeline</a>) that allow users to create a pipeline scheduling framework for implementing pipeline algorithms.</li><li>This release has introduced a new thread-id mapping algorithm to resolve unexpected thread-local storage (TLS) errors when building Taskflow projects in a shared library environment.</li></ol></section><section id="release-3-3-0_new_features"><h2><a href="#release-3-3-0_new_features">New Features</a></h2><section id="release-3-3-0_taskflow_core"><h3><a href="#release-3-3-0_taskflow_core">Taskflow Core</a></h3><ul><li>Changed all lambda operators in parallel algorithms to copy by default</li><li>Cleaned up data race errors in <a href="https://github.com/google/sanitizers">tsan</a> caused by incorrect memory order</li><li>Enhanced scheduling performance by caching tasks in the invoke loop</li><li>Added <a href="classtf_1_1Task.html#afd82ab6d6518d1142a72c4d2c97ff114" class="m-doc">tf::<wbr />Task::<wbr />data</a> to allow associating a task with user-level data</li><li>Added tf::Executor::named_async to allow associating an asynchronous task a name</li><li>Added tf::Executor::named_silent_async to allow associating a silent asynchronous task a name</li><li>Added tf::Subflow::named_async to allow associating an asynchronous task a name</li><li>Added tf::Subflow::named_silent_async to allow associating a silent asynchronous task a name</li><li>Added multi-conditional tasking to allow a task to jump to multiple successors</li><li>Added <a href="classtf_1_1Runtime.html" class="m-doc">tf::<wbr />Runtime</a> tasking interface to enable in-task scheduling control</li><li>Added <a href="classtf_1_1FlowBuilder.html#a97be7ceef6fa4276e3b074c10c13b826" class="m-doc">tf::<wbr />Taskflow::<wbr />transform</a> to perform parallel-transform algorithms</li><li>Added <a href="classtf_1_1Graph.html" class="m-doc">tf::<wbr />Graph</a> interface to allow users to create custom module tasks</li><li>Added <a href="classtf_1_1FlowBuilder.html#a5627f7962099ac7c4986993cffa7b909" class="m-doc">tf::<wbr />FlowBuilder::<wbr />erase</a> to remove a task from the associated graph</li></ul></section><section id="release-3-3-0_cudaflow"><h3><a href="#release-3-3-0_cudaflow">cudaFlow</a></h3><p>Starting from v3.3, using <a href="classtf_1_1cudaFlow.html" class="m-doc">tf::<wbr />cudaFlow</a> needs to include the header, <code>taskflow/cuda/cudaflow.hpp</code>. See <a href="release-3-3-0.html#release-3-3-0_breaking_changes" class="m-doc">Breaking Changes</a>.</p></section><section id="release-3-3-0_syclflow"><h3><a href="#release-3-3-0_syclflow">syclFlow</a></h3><p>This release does not have any update on syclFlow.</p></section><section id="release-3-3-0_utilities"><h3><a href="#release-3-3-0_utilities">Utilities</a></h3><ul><li>Added <a href="classtf_1_1SmallVector.html" class="m-doc">tf::<wbr />SmallVector</a> to the documentation</li><li>Added relax_cpu call to optimize the work-stealing loop</li></ul></section><section id="release-3-3-0_profiler"><h3><a href="#release-3-3-0_profiler">Taskflow Profiler (TFProf)</a></h3><p>This release does not have any update on the profiler.</p></section></section><section id="release-3-3-0_bug_fixes"><h2><a href="#release-3-3-0_bug_fixes">Bug Fixes</a></h2><ul><li>Fixed incorrect static TLS access when building Taskflow in a shared lib</li><li>Fixed memory leak in updating <a href="classtf_1_1cudaFlowCapturer.html" class="m-doc">tf::<wbr />cudaFlowCapturer</a> of undestroyed graph</li><li>Fixed data race in the object-pool when accessing the heap pointer</li><li>Fixed invalid lambda capture by reference in <a href="classtf_1_1FlowBuilder.html#a35e180eb63de6c9f28e43185e837a4fa" class="m-doc">tf::<wbr />Taskflow::<wbr />sort</a></li><li>Fixed invalid lambda capture by reference in <a href="classtf_1_1FlowBuilder.html#afb24798ebf46e253a40b01bffb1da6a7" class="m-doc">tf::<wbr />Taskflow::<wbr />reduce</a></li><li>Fixed invalid lambda capture by reference in <a href="classtf_1_1FlowBuilder.html#aa62d24438c0860e76153ffd129deba41" class="m-doc">tf::<wbr />Taskflow::<wbr />transform_reduce</a></li><li>Fixed invalid lambda capture by reference in <a href="classtf_1_1FlowBuilder.html#aae3edfa278baa75b08414e083c14c836" class="m-doc">tf::<wbr />Taskflow::<wbr />for_each</a></li><li>Fixed invalid lambda capture by reference in <a href="classtf_1_1FlowBuilder.html#a3b132bd902331a11b04b4ad66cf8bf77" class="m-doc">tf::<wbr />Taskflow::<wbr />for_each_index</a></li></ul><p>If you encounter any potential bugs, please submit an issue at <a href="https://github.com/taskflow/taskflow/issues">issue tracker</a>.</p></section><section id="release-3-3-0_breaking_changes"><h2><a href="#release-3-3-0_breaking_changes">Breaking Changes</a></h2><p>For the purpose of compilation speed, you will need to separately include the follwoing files for using specific features and algorithms:</p><ul><li><code>taskflow/algorithm/reduce.hpp</code> for creating a parallel-reduction task</li><li><code>taskflow/algorithm/sort.hpp</code> for creating a parallel-sort task</li><li><code>taskflow/algorithm/transform.hpp</code> for creating a parallel-transform task</li><li><code>taskflow/algorithm/pipeline.hpp</code> for creating a parallel-pipeline task</li><li><code>taskflow/cuda/cudaflow.hpp</code> for creating a <a href="classtf_1_1cudaFlow.html" class="m-doc">tf::<wbr />cudaFlow</a> and a <a href="classtf_1_1cudaFlowCapturer.html" class="m-doc">tf::<wbr />cudaFlowCapturer</a> tasks</li><li><code>taskflow/cuda/algorithm/for_each.hpp</code> for creating a single-threaded task on a CUDA GPU</li><li><code>taskflow/cuda/algorithm/for_each.hpp</code> for creating a parallel-iteration task on a CUDA GPU</li><li><code>taskflow/cuda/algorithm/transform.hpp</code> for creating a parallel-transform task on a CUDA GPU</li><li><code>taskflow/cuda/algorithm/reduce.hpp</code> for creating a parallel-reduce task on a CUDA GPU</li><li><code>taskflow/cuda/algorithm/scan.hpp</code> for creating a parallel-scan task on a CUDA GPU</li><li><code>taskflow/cuda/algorithm/merge.hpp</code> for creating a parallel-merge task on a CUDA GPU</li><li><code>taskflow/cuda/algorithm/sort.hpp</code> for creating a parallel-sort task on a CUDA GPU</li><li><code>taskflow/cuda/algorithm/find.hpp</code> for creating a parallel-find task on a CUDA GPU</li></ul></section><section id="release-3-3-0_deprecated_items"><h2><a href="#release-3-3-0_deprecated_items">Deprecated and Removed Items</a></h2><p>This release does not have any deprecated and removed items.</p></section><section id="release-3-3-0_documentation"><h2><a href="#release-3-3-0_documentation">Documentation</a></h2><ul><li>Revised <a href="install.html" class="m-doc">Building and Installing</a><ul><li><a href="install.html#BAIBuildSanitizers" class="m-doc">Build Sanitizers</a></li></ul></li><li>Revised <a href="StaticTasking.html" class="m-doc">Static Tasking</a><ul><li><a href="StaticTasking.html#AttachUserDataToATask" class="m-doc">Attach User Data to a Task</a></li></ul></li><li>Revised <a href="ComposableTasking.html" class="m-doc">Composable Tasking</a><ul><li><a href="ComposableTasking.html#CreateACustomComposableGraph" class="m-doc">Create a Custom Composable Graph</a></li></ul></li><li>Revised <a href="ConditionalTasking.html" class="m-doc">Conditional Tasking</a><ul><li><a href="ConditionalTasking.html#CreateAMultiConditionTask" class="m-doc">Create a Multi-condition Task</a></li></ul></li><li>Revised <a href="GPUTaskingcudaFlow.html" class="m-doc">GPU Tasking (cudaFlow)</a></li><li>Revised <a href="GPUTaskingcudaFlowCapturer.html" class="m-doc">GPU Tasking (cudaFlowCapturer)</a></li><li>Revised <a href="LimitTheMaximumConcurrency.html" class="m-doc">Limit the Maximum Concurrency</a><ul><li><a href="LimitTheMaximumConcurrency.html#DefineAConflictGraph" class="m-doc">Define a Conflict Graph</a></li></ul></li><li>Revised <a href="ParallelSort.html" class="m-doc">Parallel Sort</a> to add header-include information</li><li>Revised <a href="ParallelReduction.html" class="m-doc">Parallel Reduction</a> to add header-include information</li><li>Revised <a href="cudaFlowAlgorithms.html" class="m-doc">cudaFlow Algorithms</a> to add header-include information</li><li>Revised <a href="cudaStandardAlgorithms.html" class="m-doc">CUDA Standard Algorithms</a> to add header-include information</li><li>Added <a href="RuntimeTasking.html" class="m-doc">Interact with the Runtime</a></li><li>Added <a href="ParallelTransforms.html" class="m-doc">Parallel Transforms</a></li><li>Added <a href="TaskParallelPipeline.html" class="m-doc">Task-parallel Pipeline</a></li></ul></section><section id="release-3-3-0_miscellaneous_items"><h2><a href="#release-3-3-0_miscellaneous_items">Miscellaneous Items</a></h2><p>We have published Taskflow in the following venues:</p><ol><li>Tsung-Wei Huang, Dian-Lun Lin, Chun-Xun Lin, and Yibo Lin, &quot;<a href="https://tsung-wei-huang.github.io/papers/tpds21-taskflow.pdf">Taskflow: A Lightweight Parallel and Heterogeneous Task Graph Computing System</a>,&quot; <em>IEEE Transactions on Parallel and Distributed Systems (TPDS)</em>, vol. 33, no. 6, pp. 1303-1320, June 2022</li><li>Tsung-Wei Huang, &quot;<a href="https://tsung-wei-huang.github.io/papers/tpds21-taskflow.pdf">TFProf: Profiling Large Taskflow Programs with Modern D3 and C++</a>,&quot; <em>IEEE International Workshop on Programming and Performance Visualization Tools (ProTools)</em>, St. Louis, Missouri, 2021</li></ol><p>Please do not hesitate to contact <a href="https://tsung-wei-huang.github.io/">Dr. Tsung-Wei Huang</a> if you intend to collaborate with us on using Taskflow in your scientific computing projects.</p></section>
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